Tundra occurs at high elevations on mountains
Indicate whether the statement is true or false
TRUE
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A botanist is studying the growth rings of a redwood tree. She notices that three concentric rings are very thin compared to the surrounding growth rings. What can she deduce from the occurrence of these thin growth rings?
A. The tree developed more apical shoot meristems during that time period. B. The tree may have experienced a drought or had limited access to nutrients during that time period. C. The tree developed more secondary xylem during that time period. D. The tree had ample access to water and other resources during that time period.
Which of the following is NOT a steroid
hormone?
a. testosterone b. epinephrine c. cortisol d. aldosterone e. all of these are steroid hormones
A researcher is working to generate a new cancer drug. Thus far, he has identified a compound that can reduce the size of tumors in the lung. However, in order for the drug to work, the lung tumor has to be small. In addition, the tumor cannot have metastasized (spread to other areas of the body). Furthermore, he knows that the drug acts to prohibit the signaling from one tumor cell to another tumor cell. Given the above information, this new drug prohibits:
A. paracrine signaling between tumor cells. B. autocrine signaling between tumor cells. C. synaptic signaling between tumor cells. D. endocrine signaling between tumor cells.
The main role of the liver is to ________
A) absorb nutrients B) absorb water C) produce bile, which helps the process of digestion D) break large food into smaller food bits